Omega Speedmaster Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet

Reference 310.55.42.50.13.001

Omega Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet

About this watch

The Omega Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet is a masterpiece of horology, blending art, history, and cutting-edge technology. Crafted from Sedna Gold, this watch boasts a unique color that's both warm and striking. Its round shape and sunburst brown finish give it a luxurious feel, while the diamond-set bezel adds a touch of elegance. The 3861 is equipped with a chronograph feature, allowing you to measure elapsed time with precision. At its heart lies the Omega caliber 3861, an updated version of the legendary caliber 861/1861, featuring a co-axial escapement and silicon balance spring for accuracy and reliability. Master Chronometer certified by METAS, this watch has undergone rigorous testing to withstand magnetic fields of up to 15,000 gauss. Its sleek design and exceptional craftsmanship make it a standout in any collection. Whether you're at a formal event or a casual outing, this watch is sure to turn heads.
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Key Features

  • Sedna Gold case
  • Manual-winding chronograph movement
  • Co-axial escapement and silicon balance spring
  • Master Chronometer certified by METAS
  • Diamond-set bezel
  • Water resistance up to 50 meters
  • 42.00 mm diameter and 13.18 mm height

Specifications

Brand
Omega
Family
Speedmaster
Model
Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet
Reference
310.55.42.50.13.001
Movement
3861
Movement Features
  • Small Seconds, Hours, Minutes
  • Chronograph
  • Chronometer
Case
Sedna Gold 42mm
Dial Color
Brown
Crystal
Sapphire
Water Resistance
50

Current Listings

[WTS][US] Omega Speedmaster Moonwatch Professional - White Dial - 310.30.42.50.04.001 - Full Set

[US] Omega Speedmaster Moonwatch Professional - White Dial - 310.30.42.50.04.001 - Full Set

Omega - 310.30.42.50.04.001 · $7,975
Up for sale is an Omega Speedmaster Moonwatch Professional - White Dial, in fantastic condition and functions perfectly.

  • Condition: pristine with minor hairlines on clasp, case, and bracelet
  • Case size: 42mm diameter
Posted at
Apr 24, 2026, 8:29 AM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster 50th Anniversary – No. 927/1957 – Limited Edition – Full Set

Omega Speedmaster 50th Anniversary – No. 927/1957 – Limited Edition – Full Set

Omega - 50th Anniversary Limited Edition · $10,549
A numbered Omega Speedmaster 50th Anniversary Limited Edition, No. 927 of 1,957 pieces, a highly collectible tribute to the original 1957 Speedmaster.

  • Condition: Very good overall condition with honest wear
  • Case size: 42mm diameter
  • Dial material: black enamel
  • Movement type: Omega manual-wind chronograph
Posted at
Apr 23, 2026, 11:59 PM
Active
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[WTS] Omega Speedmaster Date ref. 3211.30.00 40mm | Great Condition (with Box & Serviced) | $2300

Omega Speedmaster Date ref. 3211.30.00 40mm | Great Condition (with Box & Serviced) | $2300

Omega - 3211.30.00 · $2,300
The Omega Speedmaster Date ref. 3211.30.00 is a modern Speedmaster that delivers a lot of watch for the money, with a clean all-silver dial configuration and polished hands creating a refined and versatile look.

  • Condition: great condition
  • Case size: 40mm diameter
  • Lug to lug length: 50mm
  • Thickness: 15mm
Posted at
Apr 23, 2026, 9:27 PM
Active
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[WTS] Omega Speedmaster Racing 326.30.40.50.01.001 – Full Set

Omega Speedmaster Racing 326.30.40.50.01.001 – Full Set

Omega - 326.30.40.50.01.001 · $3,100
Omega Speedmaster Racing, one of the seller's favorite watches, barely worn and in excellent condition.

  • Condition: ~95% - minor scratches on clasp
  • Scratch Location: clasp
Posted at
Apr 23, 2026, 8:41 PM
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[WTS] Omega Speedmaster Professional Moonwatch – Ref. 310.30.42.50.01.001 – Excellent Condition – 2022

Omega Speedmaster Professional Moonwatch – Ref. 310.30.42.50.01.001 – Excellent Condition – 2022

Omega - 310.30.42.50.01.001 · $5,499
This Omega Speedmaster Professional Moonwatch features the iconic Hesalite crystal and manual-wind Master Chronometer movement 3861, staying true to its heritage while adding updated movement technology and finishing.

  • Condition: Excellent, minimal hairline scratches.
  • Case Size: 42mm
  • Movement: Manual-wind Co-Axial Master Chronometer (Cal. 3861)
  • Crystal: Hesalite
Posted at
Apr 23, 2026, 6:43 PM
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[WTS] Omega Speedmaster 40 3211.31

Omega Speedmaster 40 3211.31

Omega - 3211.31 · $2,299
This Omega Speedmaster 40 is a watch with a 40mm diameter, featuring a 7" bracelet.

  • Condition: Watch only (minor scratch)
  • Case Size: 40mm
  • Bracelet Length: 7 inches
Posted at
Apr 23, 2026, 6:13 PM
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[WTS] BNIB 2026 Omega Speedmaster Professional White $7,899

BNIB 2026 Omega Speedmaster Professional White $7,899

Omega - 310.30.42.50.04.001 · $7,899
The Omega Speedmaster Moonwatch Professional features a glossy white lacquered dial, black markers, and red 'Speedmaster' text, with a modern and luxurious look thanks to its sapphire crystal. The 42mm case wears comfortably with a 5mm tapered bracelet. It's powered by the hand-wound Cal 3861 movement.

  • Condition: Brand new in box with no issues
  • Case size: 42mm diameter
  • Case thickness: 13.2mm
  • Lug width: 20mm
Posted at
Apr 23, 2026, 6:12 PM
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[WTS] Omega Speedmaster 38 Co-Axial Chronograph 324.30.38.50.02.001

Omega Speedmaster 38 Co-Axial Chronograph 324.30.38.50.02.001

Omega - 324.30.38.50.02.001 · $3,999
This Omega Speedmaster 38 Co-Axial Chronograph features a silver dial and comes with various accessories such as the original Omega stainless steel bracelet, inner box, outer box, instruction manual, pictograms card, Watchfinder certificate of authenticity, and an Omega Cream Watch Pouch.

  • Condition: Excellent overall condition with very minimal wear
  • Bracelet condition: Brand-new, unworn
  • Includes: Omega inner box, outer box, instruction manual, pictograms card, Watchfinder certificate of authenticity, cream watch pouch
Posted at
Apr 23, 2026, 6:05 PM
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[WTS] 2022 Omega Speedmaster Dark Side Of The Moon DSOTM "Pitch Black" reference 311.92.44.51.01.004 Box and Papers

2022 Omega Speedmaster Dark Side Of The Moon DSOTM "Pitch Black" reference 311.92.44.51.01.004 Box and Papers

Omega - 311.92.44.51.01.004 · $7,327
A bold and modern interpretation of the legendary Speedmaster, featuring an all-black aesthetic that delivers a sleek, stealthy presence on the wrist.

  • Condition: Excellent
  • Case size: 44.25mm
  • Movement: Manual-wind Co-Axial Caliber 1869
  • Crystal: Sapphire
Posted at
Apr 23, 2026, 3:42 PM
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